6 cly to 4 cly
But to answer your question seriously... I believe it's the #2, and #5 injectors that need to be unplugged. Make sure you take your spark plugs out of the holes without the injectors too.
actually ive though of the same thing..... 4 real i have
i dont see why it woudl not work, on say the highway. it take something like 14hp to power a truck at 60, idk i forgot the #'s
but im going to try it witl my 85 300zx, bascally hook injectors up to toggle switches, once i get up to speed, cut some off. hahahahah
go ahead and flame. but whenever i try it ill let ya know how it works out.
i dont see why it woudl not work, on say the highway. it take something like 14hp to power a truck at 60, idk i forgot the #'s
but im going to try it witl my 85 300zx, bascally hook injectors up to toggle switches, once i get up to speed, cut some off. hahahahah
go ahead and flame. but whenever i try it ill let ya know how it works out.
anyway, I still say it wouldnt work. engineers spent countless combined hours to make the engines that cut the cylinders for cruising, and there are many variables, which our cars dont have, that make it work.
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Joined: Apr 2007
Posts: 1,323
From: Albuquerque, NM
part of the reason pearl says to pull the plugs. it would remove the compresion of the stroke, so it wouldnt work so hard. reminds me of what some of the harley engine builders do on their big engines with high compression; the put in a comp. relief valve that is opened prior to starting the engine, so that it would start with a stock(ish) starter or, depending on the rider, kick start.
anyway, I still say it wouldnt work. engineers spent countless combined hours to make the engines that cut the cylinders for cruising, and there are many variables, which our cars dont have, that make it work.
anyway, I still say it wouldnt work. engineers spent countless combined hours to make the engines that cut the cylinders for cruising, and there are many variables, which our cars dont have, that make it work.
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Joined: Jan 2008
Posts: 447
Gotta agree with you there, come to thing of it, aren't all engines that variable displacement has been used in V8s? V8s are naturally balanced as V4s would be where as there is some work to be done to balance a V6 and taking a balanced V6 and making it a V4 would unbalance it I'd think
the idle will never be smooth when running a 6 cylinder motor on 4 cylinders.
Notice how the only motors with cylinder deactivation are V-8s?
they are more easily balanced to run on 4 cylinders (running on 6 is rough)
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Joined: Aug 2007
Posts: 26
From: Key West FL
and no, i cannot cite any. i just heard of it here and there, on commercials, reviews of concepts and new-production vehicles, etc.
Senior Member
Joined: Apr 2008
Posts: 1,355
From: Surrey, B.C
we have to do a lot of work to make 3rd gen work like that and its not worth it...and i dont think so if u can make 3rd gen work on 4 cylinder....its either 6 or 3....cuz as far i know our maxima have firing order 1-2-3-4-5-6....and there are two banks...3 cylinders under each bank so we have to turn off 1 bank to make 3rd gen work better ...it means 1 bank off 3 cylinders off.....like Chrysler 300c v8....its either 8 cylinder or 4...not 6
Last edited by burhan92SE; Aug 2, 2008 at 11:32 PM.
For 1981 Cadillac introduced a new engine that would become notorious for its unreliability, the V8-6-4 (L62). The L61 had not provided a significant improvement in the company's CAFE numbers, so Cadillac and Eaton Corporation devised a cylinder deactivation system that would shut off two or four cylinders in low-load conditions such as highway cruising, then reactivate them when the throttle was opened. When deactivated, fuel was cut off to the cylinder. Also oil pressure was used to shut off the cam lifters for the cylinders, preventing air from being drawn into them.[1] A dashboard "MPG Sentinel" gauge could show the number of cylinders in operation, or instantaneous fuel consumption (in miles per gallon). The L62 produced 140 hp (104 kW) @ 3800 rpm and 265 ft·lbf (359 N·m) @ 1400 rpm. Cadillac hailed the L62 as a technological masterpiece, and made it standard equipment across the whole Cadillac line.
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Joined: Oct 2004
Posts: 1,205
From: Pretoria - South Africa
Ito the OP - Short of it? - if your motor was not initially designed to operate in this mode, then imo don't do any such thing - you as the operator may experience the motor to be able to operate like that, but the stresses on mechanical components (crankshaft, front harmonic balancing weight etc etc) will very quickly ensure the demise of the motor..................
Senior Member
Joined: Apr 2008
Posts: 1,355
From: Surrey, B.C
If one is willing to live with one mega heavy flywheel, then this is quite possible - daft but possible.
Ito the OP - Short of it? - if your motor was not initially designed to operate in this mode, then imo don't do any such thing - you as the operator may experience the motor to be able to operate like that, but the stresses on mechanical components (crankshaft, front harmonic balancing weight etc etc) will very quickly ensure the demise of the motor..................
Ito the OP - Short of it? - if your motor was not initially designed to operate in this mode, then imo don't do any such thing - you as the operator may experience the motor to be able to operate like that, but the stresses on mechanical components (crankshaft, front harmonic balancing weight etc etc) will very quickly ensure the demise of the motor..................
LOL running is not a term most of the owners would use on that car.
the system was dropped within a year because it didn't work, somehow a cadillac that wasn't running smooth just didn't sell very well.
The system was turned off on 99% of them within a year because of how bad it was. that is why it took so long for GM to reintroduce cylinder deactivation WHICH ONLY HAPPENS ON CRUISING. during city driving and idling it still runs on all 8.
the system was dropped within a year because it didn't work, somehow a cadillac that wasn't running smooth just didn't sell very well.
The system was turned off on 99% of them within a year because of how bad it was. that is why it took so long for GM to reintroduce cylinder deactivation WHICH ONLY HAPPENS ON CRUISING. during city driving and idling it still runs on all 8.
Senior Member
Joined: Oct 2004
Posts: 1,205
From: Pretoria - South Africa
Senior Member
Joined: Oct 2004
Posts: 1,205
From: Pretoria - South Africa
Sharks on the beach? - maybe during sardine runs yes but otherwise no - east coast of South Africa mostly (Indian Ocean) - very good shark diving in Natal in particular.
LOL running is not a term most of the owners would use on that car.
the system was dropped within a year because it didn't work, somehow a cadillac that wasn't running smooth just didn't sell very well.
The system was turned off on 99% of them within a year because of how bad it was. that is why it took so long for GM to reintroduce cylinder deactivation WHICH ONLY HAPPENS ON CRUISING. during city driving and idling it still runs on all 8.
the system was dropped within a year because it didn't work, somehow a cadillac that wasn't running smooth just didn't sell very well.
The system was turned off on 99% of them within a year because of how bad it was. that is why it took so long for GM to reintroduce cylinder deactivation WHICH ONLY HAPPENS ON CRUISING. during city driving and idling it still runs on all 8.
And didn't it only have like 2 injectors (mechanical) that failed a lot too? That car was a disaster.
LOL running is not a term most of the owners would use on that car.
the system was dropped within a year because it didn't work, somehow a cadillac that wasn't running smooth just didn't sell very well.
The system was turned off on 99% of them within a year because of how bad it was. that is why it took so long for GM to reintroduce cylinder deactivation WHICH ONLY HAPPENS ON CRUISING. during city driving and idling it still runs on all 8.
the system was dropped within a year because it didn't work, somehow a cadillac that wasn't running smooth just didn't sell very well.
The system was turned off on 99% of them within a year because of how bad it was. that is why it took so long for GM to reintroduce cylinder deactivation WHICH ONLY HAPPENS ON CRUISING. during city driving and idling it still runs on all 8.
part of it.
The V6 in the Honda Odyssey, Accord, and Pilot has cylinder deactivation.
Member
Joined: Jun 2002
Posts: 230
From: Asheville, NC
I think cylinder deactivation is mostly a gimmick. If it takes X amount of gasoline to cruise at 60mph you might as well distribute it to all available cylinders. My understanding of why a 4 cylinder uses less gasoline than a 6 is because the block is lighter and has less rotating inertia, cylinder deactivation does not address this.
Gotta agree with you there, come to thing of it, aren't all engines that variable displacement has been used in V8s? V8s are naturally balanced as V4s would be where as there is some work to be done to balance a V6 and taking a balanced V6 and making it a V4 would unbalance it I'd think
